Photosynthesis & Cellular Respiration

Together, respiration and photosynthesis keep the levels of carbon dioxide & oxygen in the atmosphere ______ .

a. constantly changing
b. constantly increasing
c. fairly constant
d. constantly decreasing

How are photosynthesis and respiration related?

a. They both produce oxygen
b. They have the same equation
c. They have opposite equations
d. They both produce carbon dioxide

The stage of respiration that releases most of the energy in glucose occurs in the ___

a. nucleus
b. chloroplast
c. mitochondria
d. cytoplasm

What happens during respiration?

a. oxygen is released into the air
b. glucose is broken down, releasing energy
c. water and carbon dioxide are converted into energy
d. carbohydrates are released into the bloodstream

How does photosynthesis benefit heterotrophs?
a. it creates clean water
b. it adds carbon dioxide to the air
c. it creates food that they can eat
d. it eliminates harmful sugars

What happens during photosythesis?
a. The cell uses oxygen to make food
b. the cell uses glucose to make oxygen
c. the cell uses the energy in sunlight to make food
d. the cell uses the energy in sunglight to make carbon dioxide

What are the products of photosynthesis?

a. carbon dioxide & water
b. oxygen & water
c. oxygen & sugars
d. carbon dioxide and sugars

Carbon dioxide enter the plant through ___

a. stomata
b. chloroplasts
c. pigments
d. chlorophyll

What captures energy from sunlight during photosynthesis?

a. solar cells
b. stomata
c. carbohydrates
d. chlorophyll & other pigments

What is chemotherapy?

a. use of drugs to treat disease
b. use of surgery to treat disease
c. use of radiation to treat disease
d. use of drugs to prevent cancer

Scientists think cancer begins when____

a. cells stop growing
b. DNA replication stops
c. a cell divides too slowly
d. a mutation occurs in DNA

Cancer is a disease in which cells ____

a. grow and divide uncontrollably
b. die before they can mature
c. stop producing DNA
d. die during mitosis

Mitosis is the stage of the cell cycle during which the ___

a. cell's nucleus divides into 2 new nuclei
b. cell's DNA is replicated
c. cell divides into 2 new cells
d. cell's cytoplasm divides

Under which of the following conditions is lactic-acid fermentation most likely to occur?

a. playing video games
b. sleeping
c. a very fast run
d. a long walk

The energy-releasing process that does not require oxygen is called ____

a. photosynthesis
b. respiration
c. fertilization
d. fermentation

Cells in many-celled organisms ____

a. all look the same
b. are often quite different from each other
c. all have the same structure
d. are the same size in every part of the organism

Specialized cells are found only in ___

a. many-celled organisms
b. bacteria
c. single-celled organisms
d. animals

All organic compounds contain the element ______
a. nitrogen
b. carbon
c. oxygen
d. water

Small opening called ____ allow carbon dioxide to enter a leaf.

a. chloroplasts
b. chlorophyll
c. stomata
d. windows

Energy from glucose is released in the process of ______

a. perspiration
b. photosynthesis
c. mutation
d. respiration

The products of respiration are energy, carbon dioxide, and ________

a. water
b. oxygen
c. sugar
d. sunlight

When a mutation disturbs the cell cycle, the result can be _______, or uncontrolled cell division.

a. radiation
b. cancer
c. chemotherapy
d. fermentation

Chloroplasts contain a pigment called _____ that captures the energy in light.

a. color
b. chlorophyll
c. stomata
d. xylem

A(n) _______ is a group of similar cells that work togehter to perform a specific function.

a. tissue
b. organ
c. organelle
d. chlorplast

A heterotroph is an organism that cannot _______

a. mutate
b. reproduce
c. make its own food
d. move

ESSAY QUESTION: Explain the following statement: Photosythesis and respiration are opposite processes.

ESSAY QUESTION: Animals do not make their own food from energy in sunlight. Explain why they still depend on the sun for energy.

ESSAY QUESTION: Contrast mitochondria and chloroplasts.